Merge branch 'main' into datatable

CHANGES.rst

@@ -10,6 +10,8 @@ Changelog
 - Fix: if there are multiple forms on a page, each csv button downloads the record of all the forms,
   now if there is a block_id parameter, the csv is filtered on that.
   [mamico]
+- Subject templating
+  [folix-01]
 - Handle the edge cases where the `blocks` attribute is not set.
   [mamico]
 

README.rst

@@ -277,6 +277,12 @@ This is useful for some SMTP servers that have problems with `quoted-printable`
 By default the content-transfer-encoding is `quoted-printable` as overridden in
 https://github.com/zopefoundation/Products.MailHost/blob/master/src/Products/MailHost/MailHost.py#L65
 
+
+Email subject templating
+========================
+You can also interpolate the form values to the email subject using the field id, in this way: ${123321123}
+
+
 Header forwarding
 =========================
 

src/collective/volto/formsupport/restapi/services/submit_form/post.py

@@ -322,11 +322,26 @@ def get_acknowledgement_field_value(self):
                     if data.get("field_id", "") == field.get("field_id"):
                         return data.get("value")
 
-    def send_data(self):
+    def get_subject(self):
         subject = self.form_data.get("subject", "") or self.block.get(
             "default_subject", ""
         )
 
+        for i in self.form_data.get("data", []):
+            # Handle `field_name_321323` kind of id used by frontend package
+            field_id = i.get("field_id", "").split("_")[-1]
+
+            if not field_id:
+                continue
+
+            subject = subject.replace("${" + i.get("field_id") + "}", i.get("value"))
+
+        return subject
+
+    def send_data(self):
+
+        subject = self.get_subject()
+
         mfrom = self.form_data.get("from", "") or self.block.get("default_from", "")
         mreply_to = self.get_reply_to()